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API 5DP Drilling, For well drilling
GB9948-1988 is for manufacturing of furnace tubes, heat exchangers and pipelines in refineries
Welding Neck Flange,Blind Flange,Lap Joint Flange,Slip On Flange, Socket Weld Flange
45 Degree Elbow,90 Degree Elbow,180 Degree Elbow
Carbon Tee, Socket Tee, Unequal Tee, Short Tee,,Equal Tee,,Forging Tee, Thread Tee, Copper Tee
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